Lens holder



H. w. HILL L N n LDER May 15, 1923.

Filed Nov. 25. 1920 INVENTOR HARRYVV- mu.

Patented May 15, 1923.

stereo stares HARRY TV; HILL, 9F SOUTHBRIDGE,

earner llIASSACHIiSETTS, Assreivon ro AMERICAN 1.455.439 se ne...

OETIGAL COIVIPANY, G1 SOUTHBRIDGE, MASSACHUSETTS, A VOLUNTARY ASSOCIATION OE MASSACHUSETTS.

LENS HOLDER.

B .pp1ication filed ri'oveni'ner 23, 1929. Serial No. 425,808.

in lens holders and has particular reference .to a mechanical form of lens holder as distinguished from those now commercially used and. also those of the prior art.

It is, therefore, the purpose of my invention to obviate these prior art difliculties and to provide new and novel means for mechanically holding the lenses'without the use of adhesive, so that there is no special labor of blocking and no subsequent cleaning or removing of the blocking adhesive.

required.

Other objects and advantages of my improvement should be readily apparent by reference to the following specification taken in connection with the accompanying drawings, and it will be understood that I may make any modifications in the specific details of construction shown and described Within the scope of the appended claims Without departing from or exceeding the spirit of my invention.

Figure I represents a view ofone embodiment of my invention in use.

Figure II represents a bottom plan view of the structure as illustrated in Figure I.

Figure III represents a top plan view thereof.

Figure IV represents a sectional view as on the line IV-IV of Figure III.

Figure V represents a sectional view of this particular type of mechanism in use;

In the accomplishment of this result I makeuse of an improved block comprising the body portion 1 having the upstanding socketed portion 2 to rot-atably receive the lens pin This body portion is provided with a plurality of'radiating arms or lugs 4 which have beenv illustrated as substantially triangular in form with the base of the triangle outward. On each of the sides of the triangle adjacent the base I have shown as formed the arcuate lugs or fingers 5 so positioned as to properly engage the edges of a' lens 6, the lens here being shown as a circular form and the fingers 5 of the proper form and size to; just receive and satisfactorily fit around the portion-of lens opposed thereto. Secured to the back of each of the. members 4. is the heavy spring member 7 having the depending ends 8 which project above the lens seat 9 and serve to grippingly engage the edge of the a lens member ,6, the pressure of the springs 8 being in the direction of the seats 5.

This is, of particular advantage since place by being placed in engagement with the members 5.. and pressed against the while the lenses may be easily snapped into slightly flared spring ends 8, or may be rei moved by pressing against the edge of the lens overhanging the base of the triangular lug 4, at the same time the pressure of the grinding tool 10, as shown in Figure V, is such as to separate or force the'lenses out? wardly. This outward forcing, it will be seen, supplements the action of the springs S so that the lens is at all times held out or against the. rigid stationary lugs on the holder, being supplemented by the action of the springs so that the greater the grindmg pressure the more securely the lenses are held, in place of being loosened as might be the case where the springs at the outer instead of at the inner side of the block.

It is to be noted thatin the .drawingsI have shown my invention with the seats 9 so disposed as to properly support thelens blank 6 to have but a segment or recess 11 ground'in their faces in place of the whole lens being ground, but this is purely a matter of choice and my invention is equally applicablev whether but a portion or the entirety of the lens is being ground.

I claim:

1. A device of the character described comprising a body .portion having a pin receiving socket and-a plurality of radiating arms, each of said arms being formed With a lens receiving seat and with terminal projections adjacent the seat, and U-shaped spring members secured to and spanning the inner portions of each of the arms and havtool, and being further sides and resilient lens engaging members at. their inner sides.

each of said arms being provided With a lens receiving seat, each of said'arms being further provided with rigid lens abutment lugs to prevent movement of the lens over the seat as actuated by pressure against the provided with resilient means for retaining the blank in engagement With said rigid means.

, 4:. In a devicevof the character described the combination Witha body portionhaving a lens receiving seat and having a plurality 01": rigid lugs projecting adjacent the seat, of a U-shaped clamp member secured to the body portion and having the terminals of the U projecting adjacent the seat and in position to oppose the lugs and resiliently force the lens thereagainst.

In testimony WhereofI have affixed my signature, in presence of tWo Witnesses.

HARRY W. HILL.

Witnesses: ALICE G; HASKELL,

ESTHER M. LAILER. 

